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Alternator Or Fan Belt. Porsche 964 / 993 Carrera 1989-98 - 99919233851
99919233851/3
Vehicle Group
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
Information
Alternator / Fan Belt
This OE Match alternator / fan belt is a replacement drive belt for Porsche 964 and 993 models. It is used in the air-cooled engine belt drive system to operate the engine cooling fan and alternator, helping maintain correct engine cooling and battery charging performance.
FAN Belt
Porsche 964 Carrera 1989>>1994 Cars With Manual Or Tiptronic Transmission
Porsche 993 Carrera 1994>>1997 Cars With Manual Or Tiptronic Transmission
Diagram Ref No 13
OR
ALTERNATOR Belt
Porsche 964 Carrera 1989>>1994 Cars With Manual Transmission
Porsche 993 Carrera 1994>>1997 Cars With Manual Transmission
Diagram Ref 14
The alternator / fan belt transfers drive from the engine pulley to the cooling fan and alternator assembly. On air-cooled Porsche engines, this belt is essential because it powers the fan that moves cooling air across the engine and also drives the alternator to charge the battery and support the vehicle electrical system.
Functions
• Drives the engine cooling fan
• Drives the alternator for battery charging
• Supports correct air-cooled engine temperature control
• Helps maintain stable electrical system voltage
• Prevents loss of cooling fan operation caused by belt wear or failure
• Replaces cracked, glazed, stretched, or worn original belts
• OE Match replacement for correct fit and reliable belt drive performance
Why Replace This Part?
The alternator / fan belt is exposed to heat, rotation, tension, and engine bay wear. Over time, the belt can crack, stretch, glaze, fray, or lose grip. A worn or failed belt can cause charging problems, battery warning lights, cooling fan failure, overheating risk, belt noise, or complete loss of alternator output. Replacing the belt helps maintain reliable cooling and charging system operation.
When to Replace This Part
• The belt is cracked, frayed, glazed, loose, or worn
• There is squealing or slipping from the belt area
• The battery/charging warning light is illuminated
• The alternator is not charging correctly
• The engine cooling fan is not being driven properly
• The belt has been removed during alternator, fan, or pulley service
• As part of routine maintenance on Porsche 964 or 993 air-cooled engines
• As preventative replacement before long journeys or major servicing
Where it fits on the car
This belt fits in the rear engine bay on the engine pulley, alternator, and cooling fan drive assembly. It forms part of the air-cooled engine accessory drive system and is fitted at the fan/alternator housing area.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99919233851
The product you are viewing cross references to these numbers
This OE Match alternator / fan belt is a replacement drive belt for Porsche 964 and 993 models. It is used in the air-cooled engine belt drive system to operate the engine cooling fan and alternator, helping maintain correct engine cooling and battery charging performance.
FAN Belt
Porsche 964 Carrera 1989>>1994 Cars With Manual Or Tiptronic Transmission
Porsche 993 Carrera 1994>>1997 Cars With Manual Or Tiptronic Transmission
Diagram Ref No 13
OR
ALTERNATOR Belt
Porsche 964 Carrera 1989>>1994 Cars With Manual Transmission
Porsche 993 Carrera 1994>>1997 Cars With Manual Transmission
Diagram Ref 14
The alternator / fan belt transfers drive from the engine pulley to the cooling fan and alternator assembly. On air-cooled Porsche engines, this belt is essential because it powers the fan that moves cooling air across the engine and also drives the alternator to charge the battery and support the vehicle electrical system.
Functions
• Drives the engine cooling fan
• Drives the alternator for battery charging
• Supports correct air-cooled engine temperature control
• Helps maintain stable electrical system voltage
• Prevents loss of cooling fan operation caused by belt wear or failure
• Replaces cracked, glazed, stretched, or worn original belts
• OE Match replacement for correct fit and reliable belt drive performance
Why Replace This Part?
The alternator / fan belt is exposed to heat, rotation, tension, and engine bay wear. Over time, the belt can crack, stretch, glaze, fray, or lose grip. A worn or failed belt can cause charging problems, battery warning lights, cooling fan failure, overheating risk, belt noise, or complete loss of alternator output. Replacing the belt helps maintain reliable cooling and charging system operation.
When to Replace This Part
• The belt is cracked, frayed, glazed, loose, or worn
• There is squealing or slipping from the belt area
• The battery/charging warning light is illuminated
• The alternator is not charging correctly
• The engine cooling fan is not being driven properly
• The belt has been removed during alternator, fan, or pulley service
• As part of routine maintenance on Porsche 964 or 993 air-cooled engines
• As preventative replacement before long journeys or major servicing
Where it fits on the car
This belt fits in the rear engine bay on the engine pulley, alternator, and cooling fan drive assembly. It forms part of the air-cooled engine accessory drive system and is fitted at the fan/alternator housing area.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99919233851
99919233850
99919233851
The product you are viewing cross references to these numbers
Price: £5.20
In stock
Related products
Vehicle Group
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Information
Alternator belt, Narrow V-belt.
Belt size: 10 x 713 mm
The V-belt runs between the crankshaft pulley and the alternator/fan pulley. It’s the primary mechanical link that spins the alternator to charge the battery and, on air-cooled 911s and 914-6 models, turns the engine cooling fan.
Fits:
Porsche 911 1965 - 1973
Porsche 911 Turbo 1976 >>
Porsche 911 SC 1974 - 1979 (Check Size of your Belt)
Porsche 911 SC 1980 - 1983
Porsche 911 3.2L 1984 - 1989
Porsche 914 1970 - 1976
Please note: Always confirm against the belt size currently fitted and pulley setup before ordering.
Why Replacement Matters - With age and mileage, belts:
• Crack, glaze, or harden, reducing grip
• Stretch, making correct tension impossible
• Begin to slip, causing charging issues and, on air-cooled engines, reduced cooling fan speed
A slipping or failing belt can lead to battery discharge, warning lights, overheating, or being stranded. Fitting a fresh belt restores reliable alternator and fan drive, protecting both the engine and electrical system.
When to Replace - Consider replacing the alternator belt if:
• You see cracks, fraying, glazing, or missing chunks in the belt rubber
• The belt squeals on startup or under load
• The belt has stretched and can’t be tensioned correctly
• You’re doing routine service on a classic 911 / 914-6 or preparing for a long trip
• The car is undergoing engine-out work or restoration
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9991921765A
The product you are viewing cross references to these numbers
Belt size: 10 x 713 mm
The V-belt runs between the crankshaft pulley and the alternator/fan pulley. It’s the primary mechanical link that spins the alternator to charge the battery and, on air-cooled 911s and 914-6 models, turns the engine cooling fan.
Fits:
Porsche 911 1965 - 1973
Porsche 911 Turbo 1976 >>
Porsche 911 SC 1974 - 1979 (Check Size of your Belt)
Porsche 911 SC 1980 - 1983
Porsche 911 3.2L 1984 - 1989
Porsche 914 1970 - 1976
Please note: Always confirm against the belt size currently fitted and pulley setup before ordering.
Why Replacement Matters - With age and mileage, belts:
• Crack, glaze, or harden, reducing grip
• Stretch, making correct tension impossible
• Begin to slip, causing charging issues and, on air-cooled engines, reduced cooling fan speed
A slipping or failing belt can lead to battery discharge, warning lights, overheating, or being stranded. Fitting a fresh belt restores reliable alternator and fan drive, protecting both the engine and electrical system.
When to Replace - Consider replacing the alternator belt if:
• You see cracks, fraying, glazing, or missing chunks in the belt rubber
• The belt squeals on startup or under load
• The belt has stretched and can’t be tensioned correctly
• You’re doing routine service on a classic 911 / 914-6 or preparing for a long trip
• The car is undergoing engine-out work or restoration
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9991921765A
99919217650
9991921765A
520100715
The product you are viewing cross references to these numbers
Price: £7.96
In stock
Vehicle Group
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
Information
Injection pump belt
This OE Match injection pump belt is a replacement drive belt for the mechanical fuel injection system on Porsche 911 models from 1969 to 1977. It is designed to match the original-style fitment and function. This replacement belt helps drive the mechanical fuel injection pump, supporting correct fuel delivery and reliable engine running.
Fits:
Porsche 911 1969 - 1977
Diagram ref no 21
The injection pump belt transfers rotational drive to the fuel injection pump. This allows the pump to operate in sync with the engine and deliver fuel correctly. A good belt is essential for accurate fuel delivery, smooth running, and dependable engine performance on models using mechanical fuel injection.
Functions
• Replaces the injection pump drive belt
• Drives the mechanical fuel injection pump
• Supports correct fuel delivery and engine running
• Helps maintain injection pump timing and operation
• Replaces cracked, worn, stretched, frayed, or missing belts
• Suitable for fuel injection system service and preventative maintenance
• OE Match replacement for classic Porsche 911 engine service.
Why Replace This Part?
Injection pump belts wear over time due to heat, age, tension changes, pulley contact, vibration, and engine bay conditions. A worn belt can crack, stretch, fray, slip, or fail completely. If the belt fails, the injection pump may stop operating correctly, causing poor running, loss of fuel delivery, difficult starting, or engine stoppage. Replacing the belt helps maintain reliable mechanical fuel injection performance.
When to Replace This Part
• The injection pump belt is cracked, glazed, frayed, loose, or worn
• Fuel injection pump service or adjustment is being carried out
• Engine running is poor due to suspected injection pump drive issues
• The belt tension is incorrect or unstable
• The injection pump, pulleys, or related components are being serviced
• Preventative belt replacement is being carried out during scheduled maintenance
• The vehicle is undergoing Porsche 911 fuel injection or engine restoration.
Where it fits on the car
This belt fits within the mechanical fuel injection pump drive system on Porsche 911 models from 1969 to 1977. It runs around the relevant injection pump drive pulleys according to the factory engine layout.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99919203040
The product you are viewing cross references to these numbers
This OE Match injection pump belt is a replacement drive belt for the mechanical fuel injection system on Porsche 911 models from 1969 to 1977. It is designed to match the original-style fitment and function. This replacement belt helps drive the mechanical fuel injection pump, supporting correct fuel delivery and reliable engine running.
Fits:
Porsche 911 1969 - 1977
Diagram ref no 21
The injection pump belt transfers rotational drive to the fuel injection pump. This allows the pump to operate in sync with the engine and deliver fuel correctly. A good belt is essential for accurate fuel delivery, smooth running, and dependable engine performance on models using mechanical fuel injection.
Functions
• Replaces the injection pump drive belt
• Drives the mechanical fuel injection pump
• Supports correct fuel delivery and engine running
• Helps maintain injection pump timing and operation
• Replaces cracked, worn, stretched, frayed, or missing belts
• Suitable for fuel injection system service and preventative maintenance
• OE Match replacement for classic Porsche 911 engine service.
Why Replace This Part?
Injection pump belts wear over time due to heat, age, tension changes, pulley contact, vibration, and engine bay conditions. A worn belt can crack, stretch, fray, slip, or fail completely. If the belt fails, the injection pump may stop operating correctly, causing poor running, loss of fuel delivery, difficult starting, or engine stoppage. Replacing the belt helps maintain reliable mechanical fuel injection performance.
When to Replace This Part
• The injection pump belt is cracked, glazed, frayed, loose, or worn
• Fuel injection pump service or adjustment is being carried out
• Engine running is poor due to suspected injection pump drive issues
• The belt tension is incorrect or unstable
• The injection pump, pulleys, or related components are being serviced
• Preventative belt replacement is being carried out during scheduled maintenance
• The vehicle is undergoing Porsche 911 fuel injection or engine restoration.
Where it fits on the car
This belt fits within the mechanical fuel injection pump drive system on Porsche 911 models from 1969 to 1977. It runs around the relevant injection pump drive pulleys according to the factory engine layout.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99919203040
99919203040
The product you are viewing cross references to these numbers
Price: £9.55
In stock
Vehicle Group
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Information
Alternator belt, Belt size: 9.5 x 725.
This OE Match alternator belt is a replacement engine drive belt for Porsche 911 models from 1974 to 1979. It is designed to match the original-style fitment and function. This replacement drive belt helps power the alternator and cooling fan assembly, supporting reliable battery charging and engine cooling system operation.
Fits:
Porsche 911 Turbo/SC 1974 - 1979 (Please choose by size)
Diagram ref no 12
The alternator belt transfers rotational drive from the engine pulley to the alternator and fan assembly. This allows the alternator to generate electrical power for the vehicle while also helping drive the engine cooling fan. A correctly fitted and tensioned belt is essential for reliable charging, cooling airflow, and overall engine operation.
Functions
• Replaces the alternator drive belt
• Drives the alternator and cooling fan assembly
• Supports correct battery charging
• Helps maintain air-cooled engine cooling airflow
• Replaces cracked, glazed, stretched, frayed, noisy, or slipping belts
• Suitable for routine servicing and preventative maintenance
• OE Match replacement for classic Porsche 911 engine service.
Why Replace This Part?
Alternator belts wear over time due to heat, engine vibration, pulley contact, age, and tension changes. A worn belt can crack, glaze, stretch, fray, squeal, slip, or fail completely. If the belt fails, the alternator may stop charging and the cooling fan may stop operating correctly, which can lead to warning lights, battery issues, overheating risk, or vehicle breakdown. Replacing the belt helps maintain dependable charging and cooling system performance.
When to Replace This Part
• The alternator belt is cracked, glazed, frayed, loose, or worn
• Belt squeal or chirping is heard during start-up or acceleration
• The battery warning light appears
• Charging system output is low or inconsistent
• Cooling fan drive is being inspected or serviced
• Alternator, fan, pulleys, or related hardware are being repaired
• Preventative belt replacement is being carried out during scheduled maintenance.
Where it fits on the car
This belt fits on the alternator and cooling fan drive system on Porsche 911 models from 1974 to 1979. It runs between the relevant engine pulley and alternator / fan pulley according to the factory belt routing.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99919209750
The product you are viewing cross references to these numbers
This OE Match alternator belt is a replacement engine drive belt for Porsche 911 models from 1974 to 1979. It is designed to match the original-style fitment and function. This replacement drive belt helps power the alternator and cooling fan assembly, supporting reliable battery charging and engine cooling system operation.
Fits:
Porsche 911 Turbo/SC 1974 - 1979 (Please choose by size)
Diagram ref no 12
The alternator belt transfers rotational drive from the engine pulley to the alternator and fan assembly. This allows the alternator to generate electrical power for the vehicle while also helping drive the engine cooling fan. A correctly fitted and tensioned belt is essential for reliable charging, cooling airflow, and overall engine operation.
Functions
• Replaces the alternator drive belt
• Drives the alternator and cooling fan assembly
• Supports correct battery charging
• Helps maintain air-cooled engine cooling airflow
• Replaces cracked, glazed, stretched, frayed, noisy, or slipping belts
• Suitable for routine servicing and preventative maintenance
• OE Match replacement for classic Porsche 911 engine service.
Why Replace This Part?
Alternator belts wear over time due to heat, engine vibration, pulley contact, age, and tension changes. A worn belt can crack, glaze, stretch, fray, squeal, slip, or fail completely. If the belt fails, the alternator may stop charging and the cooling fan may stop operating correctly, which can lead to warning lights, battery issues, overheating risk, or vehicle breakdown. Replacing the belt helps maintain dependable charging and cooling system performance.
When to Replace This Part
• The alternator belt is cracked, glazed, frayed, loose, or worn
• Belt squeal or chirping is heard during start-up or acceleration
• The battery warning light appears
• Charging system output is low or inconsistent
• Cooling fan drive is being inspected or serviced
• Alternator, fan, pulleys, or related hardware are being repaired
• Preventative belt replacement is being carried out during scheduled maintenance.
Where it fits on the car
This belt fits on the alternator and cooling fan drive system on Porsche 911 models from 1974 to 1979. It runs between the relevant engine pulley and alternator / fan pulley according to the factory belt routing.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99919209750
99919209750
The product you are viewing cross references to these numbers
Price: £4.00
In stock